Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 78, pp. 166 Works number were 59135-59136 in April 1926.
These superheated mixed-traffic Consolidations were identical to the pair of 1921 Baldwins that went to Colombia's Southern Railway (Locobase 15018) except for a 3.4 inch (86 mm) difference in gauge. It was a small, balanced design that followed the Colombian policy of superheating small engines. The class used 8" (203 mm) piston valves to admit steam to the cylinders. Like many other Colombian engines, these locomotives operated at high altitudes, specified as 2,600 metres (8,530 feet) above sea level.
This railway had a long history in the planning, but only began construction in 1921. The road headed toward the lower Magdalena, which it reached in 1925 and where it met the Ferrocarril de Girardot. In the mid-1920s, ruling grades ran 3% and curves were as tight as 27 degrees (radii of 212 feet). By 1936, the Cundinamarca was extended toward Puerto Salgar.
After thirty years on the Cundinamarca, the 12 was sold to the Paz del Rio in 1957. When 13 went to the FC Nacional de Colombia, it took the number 40.
Principal Dimensions by Steve Llanso of Middle Run Media | |
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Class | 12 |
Locobase ID | 15366 |
Railroad | Cundinamarca |
Country | Colombia |
Whyte | 2-8-0 |
Number in Class | 2 |
Road Numbers | 12-13/8, 7 |
Gauge | 3' |
Number Built | 2 |
Builder | Baldwin |
Year | 1926 |
Valve Gear | Walschaert |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 10.17 / 3.10 |
Engine Wheelbase (ft / m) | 16.92 / 5.16 |
Ratio of driving wheelbase to overall engine wheelbase | 0.60 |
Overall Wheelbase (engine & tender) (ft / m) | 42.06 / 12.82 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
Weight on Drivers (lbs / kg) | 67,000 / 30,391 |
Engine Weight (lbs / kg) | 77,000 / 34,927 |
Tender Loaded Weight (lbs / kg) | 50,000 / 22,680 |
Total Engine and Tender Weight (lbs / kg) | 127,000 / 57,607 |
Tender Water Capacity (gals / ML) | 2400 / 9.09 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 3.30 / 3 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 28 / 14 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 37 / 940 |
Boiler Pressure (psi / kPa) | 180 / 1240 |
High Pressure Cylinders (dia x stroke) (in / mm) | 15" x 18" / 381x457 |
Tractive Effort (lbs / kg) | 16,747 / 7596.32 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.00 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 60 - 2" / 51 |
Flues (number - dia) (in / mm) | 10 - 5.375" / 137 |
Flue/Tube length (ft / m) | 14 / 4.27 |
Firebox Area (sq ft / m2) | 60 / 5.57 |
Grate Area (sq ft / m2) | 16.50 / 1.53 |
Evaporative Heating Surface (sq ft / m2) | 693 / 64.38 |
Superheating Surface (sq ft / m2) | 166 / 15.42 |
Combined Heating Surface (sq ft / m2) | 859 / 79.80 |
Evaporative Heating Surface/Cylinder Volume | 188.24 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 2970 |
Same as above plus superheater percentage | 3534 |
Same as above but substitute firebox area for grate area | 12,852 |
Power L1 | 7498 |
Power MT | 986.88 |